Increase performance of grouping

[Andy]

Hi All.

I have about a 1500 items of CallItem class in List collection.

This is description of CallItem:

public class CallItem
    {
        private DateTime callDateTime;

        public DateTime CallDateTime
        {
            get { return callDateTime; }
            set { callDateTime = value; }
        }
        private String calledNumber;

        public String CalledNumber
        {
            get { return calledNumber; }
            set { calledNumber = value; }
        }
        private String logicCall;

        public String LogicCall
        {
            get { return logicCall; }
            set { logicCall = value; }
        }
        private Int64 callDuration;

        public Int64 CallDuration
        {
            get { return callDuration; }
            set { callDuration = value; }
        }
        private Double costWithTaxes;

        public Double CostWithTaxes
        {
            get { return costWithTaxes; }
            set { costWithTaxes = value; }
        }
        private Double costWithDiscount;

        public Double CostWithDiscount
        {
            get { return costWithDiscount; }
            set { costWithDiscount = value; }
        }

        private String abonentNumber;

        public String AbonentNumber
        {
            get { return abonentNumber; }
            set { abonentNumber = value; }
        }

        public CallItem(String abonentNumber, DateTime callDateTime, Int64 callDuration, String calledNumber, Double costWithDiscount, Double costWithTaxes, String logicCall)
        {
            this.abonentNumber = abonentNumber;
            this.callDateTime = callDateTime;
            this.callDuration = callDuration;
            this.calledNumber = calledNumber;
            this.costWithDiscount = costWithDiscount;
            this.costWithTaxes = costWithTaxes;
            this.logicCall = logicCall;
        }

    }

I geting all records and bindind they to GridView like this:

List<CallItem> items = GetAllItems();
dataGridView.ItemsSource = items;
dataGridView.CreateFilterDescriptions();

And when I (or user) drag and dropping column (for example AbonentNumber) on grouping panel I need to waiting about 35 seconds.

if I heed to waiting about 35 seconds when I need grouping 1500 records then how long I need to waiting if I must grouping about 15000 records or 150000 records?

How i can increase performance of grouping in GridView? Or may be for my task I dont need to use GridView and grouping?

[Andy]

P.S. 2: here that I noticed:
When I used RadControls Q2 2008 on the same task I have 4 seconds delay for 1500 records. (It is normally).
But when I used RadControls Q3 2008 i have 35 seconds delay.

[Nedyalko Nikolov]

Hi Andy,

Thank you for the valuable feedback. I've updated your Telerik points. This is a bug in our control which will be fixed with the service pack which is scheduled for mid-December.

Kind regards,
Nedyalko Nikolov
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[Andy]

Thanks.

I'll be waiting.